Arrow of time and travel at the speed of light

In summary, the concept of a guy traveling at the speed of light makes no sense in relativity. Additionally, a massless particle cannot be parametrized by proper time and its world line can only be described by an affine parametrization. All frames agree on the direction of the arrow of time and there is no ambiguity about which event was emission and which was reception for a light pulse.
  • #36
BernieM said:
Although the scenarios people present of 'how a photon sees the universe' have been marginalized, I have yet to actually find a 'proper' model presented in a relatively simple to understand way.
A proper model of what? Of how a photon sees the universe?

There isn't one. It is improper and self contradictory at its core.
 
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  • #37
This seems like a good point at which to close the thread.
 

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